( Reaffirmed 2002 ) IS : 12011- 1987 Indian Standard CODE OF SAFETY PRACTICE FOR DOMESTlC LPG INSTALLATION Domestic and Commercial Gas Burning Sectional Committee, Appliances CPDC 23 Representing ( Pressure Type ) Chairman SHRI S. P. ADARKAR Indian Oil Corporation Ltd, Bombay Members SHRI A. K. V~TTS ( Alternate to Shri S. P. Adarkar ) SHRI P. N. BHAMBI Indian Institute of Petroleum. Dehra Dun SHRI K. N. D~BHAL ( Alternate ) SHRI DARAYUS BHATHEN~ Nat Steel Equipment Pvt Ltd, Bombay SHRI T. R. U. PILLAI ( Alternate ) SHRI P. G. BIEANI `Ioshniwal Instruments Madras, Madras SHRI PRABHAT TOSHNIWAL ( Alternate ) SHRI A. GHOSH National Test House, Calcutta SRKI D. K. RAY ( Alternate ) STIRI RUSTOX P. GINWALLA Shree Ram Engg & Mfg Industries, Vadodara SHRI S. GUHA Bharat Petroleum Corporation, Bombay SHRI I. M. MERCHANT ( Alternate ) SHRI SATISE KABRA Ideal Engineers Hyderabad Pvt Ltd, Hyderabad SHRI G. K. KABRA ( Alternate ) SHR~ J. S. KIKRERI Hindustan Petroleum Corporation Ltd, Bombay SRRI M. S. PURUSHOTHA~~~ ( Alternate ) SHRI N. K. PURI ( Alternate ) Indian Oil Corporation Ltd, Faridabad SHRI A. K. MEHTA SHRI S. P. DIJBEY ( Alternate ) Consumer Guidance Society of India, Bombay SERI R. C. MISRA SHRIRAIESH P.KHANNA S. R. Engineering Co, Bangalore SHRI SHASHI KANT WAHI ( Alternate ) United Works Pvt Ltd, Bombay SHRI VIOTOR MAO MULL SHRI RONALD C. SOPHER ( Alternate ) S. 0. Gas Products Pvt Ltd, Bhiwadi SHRI K. A. S. OBEROI SHRI DALBIR S. SODHI ( Alternate ) Pan&al Engineering Works, Ahmadabad SHRI BABUBRAI G. PANCHAL SHRI BIPINBHAI B. PANCEAL ( Alternate ) SHRI NAROTTAMDAS D. PANCHAL ( Altmautc ) ( Continuedon page 2 ) BUREAU OF INDIAN STANDARDS / This publication is protected under the Indian CoPyright Act ( XIV of 1957 ) and reproduction in whole or in part by any meanr except with written permission of the publisher shall be deemed to be an infringement of copyright under the said Act. IS : 12011 - 1987 ( Continz4ed from pup 1 ) Members Representing LT-COL S. PARQHI Ministry of Defence ( DGI ), New Delhi SHRI J. C. MAEANI ( Alternate ) SHRI G. L. PATANKAR Khadi & Village Industries Commission, Bombay SHRI E. M. PATEL Indian Gas Cylinders, Faridabad SHRI RAROUL H. RAI Super Parts Pvt Ltd, Faridabad SHRI V~VEX LUTHER ( Alternate) SHRI M. RAMACH~NDR~N Niky Tasha India Pvt Ltd, Faridabad SHRI A. C. GOYAL ( Alternate ) Petroleum Conservation Research Association, SHRI B. RAMCEANDRAN New Delhi SHRI S. SHRINATH Rao ( Alternate ) Faridabad Gas Gadgets Pvt Ltd, Faridabad SHRI D. S. RATTIA SHRI H. L. CNANDA ( Alternate ) SHRI RAJESH SAN~HAN~ Unicorn Industries, Secunderabad SHRI S. K. RAMESH ( Alternate) Oriental Appliances Pvt Ltd, Madras SHRI H. SANKARANII~AYANAN SHRI D. SUDHAKAR REDDY ( Alternate ) Federation of Hotel and Restaurant Associationof SHRI S. P. SHARMA India, New Delhi Faridabad Auto Industries Pvt Ltd, Faridabad SHRI D. R. SHUKLA Fuse Base India Pvt Ltd, Faridabad SHRI M. SUBRAMANIAM Bombay Foods Private Ltd, Bombay SHRI L. D. TRAKEAR SHRI K. L. VBnnr.% Sunflame Industries, Faridabad SERI R. K. MALIK ( Alternate ) Eastern Gas Appliances, Kundli SARI VIJAY KUMA~ Director General, BIS ( Ex-@cicio Member ) Da A. S. SETHI, Director ( Consr Prods & Med Instrs ) Secrelary Joint Director SHRI M. K. BHATIA ( Consr Prods & Med Instrs ), BIS 2 IS :12011-1987 Indian Standard CODE OF SAFETY PRACTICE FOR DOMESTlC LPG INSTALLATION 0. 0.1This FOREWORD Indian Standard was adopted by the Indian Standards Institution on 24 March 1987, after the draft finalized by the Domestic and Commercial Gas Burning Appliances ( Pressure Type ) Sectional Committee had been approved by the Consumer Products and Medical Instruments Division Council. 0.2 The Liquefied Petroleum Gases ( LPG ) are hydrocarbons in gaseous state at normal atmospheric pressure, and under moderate pressure at normal temperature, are stored, filled and transported as liquid in portable cylinders but used as gas. Thus large volume of gas approximately 246 volumes is stored under pressure in one volume of liquid LPG in cylinder. 0.3 LPG produced and marketed in India conforms to IS : 4576-1978" and designated as Commercial Butane/Propane Mixture. LPG is colourless, odourless and being highly inflammable, a malodourant ( foul smell ) is added to detect gas leakage. The gas is twice as heavy as air and can form explosive mixture with air even in very small concentrations.. It boils at temperatures below freezing point of ice, thus at normal temperatures are exerting internal pressure, which is several times that of atmospheric. Although cylinders are designed and tested for the requisite internal pressure, at excessive temperatures the gas in cylinder can attain internal pressure which can result in its failure to stand such pressure. LP Gases in liquid form have a tendency for very large expansion in volume. It expands almoct 10 times as much as water and 100 times that of steel. Thus, liquid LPG is never filled in cylinder up to brim but an ullage or space for gas is left above liquid. 0.3.1 In view of the above and other safety related properties some simple rules/code need be observed for its safe operation/installation. Because the rules are simple, they are neglected. Failure to observe these rules may lead to accidents of varying intensity. This code assumes *Specification for liquefied petroleum gases ( jirst 3 reoision ). iS:12011- 1987 in of is particular relevance to Indian conditions where the use of LPG individual household has been widely expanding and protection consumers from the hazards arising during installation and operation of vital interest. 0.4 While preparing this standard, it is presumed that only standardized and approved equipment and appliances are used in the LPG installation. The distribution equipment that is cylinder, valve and pressure regulator, are the property of oil companies loaned to the consumer against refundable deposit. The maintenance of the same is the responsibility of oil companies. Do not tamper with the equipment. 1. SCOPE 1.1 This standard during installation cylinders as fuel. 2. -GENERAL 2.1 The term Domestic shall mean Individual shall mean to consist of the following: Household and Installation covers general safety requirements and operation of domestic appliances to be observed using LPG in fitted with a spring A cylinder conforming to IS : 3196-1382* actuated self closing valve conforming to IS : 8i37 ( Part 2 )19787 and approved by the Chief Controller of Explosives for India. b) A pressure regulator of appropriate type matching the cylinder valve and conforming to IS : 9798- 1981:. LPG resistant flexible tubing conforming to IS : 10908-19845 or C> any other approved type metallic shielded/braided tubing. 4 4 An appliance such as LPG stove conforming to IS : 4246-198411 and/or cooking range conforming to IS : 4760-19797 and/or grillers confox ming to IS : 11480-1985"" or any other approved appliance for domestic use. *Specification for welded low carbon steel gas cylinder exceeding 5-litre water capacity for low pressure liquefiable gases ( third recision ). tspecification for valve littings for use with liquefied petroleum gas ( LPG ) cylinders of more than 5 litre capacity: Part 2 Valve fittings for newly manufactured LPG cylinders. $Specification for low pressure regulators for use with liquefied petroleum gas ( LPG ) mixtures. §Specification for flexible rubber tubing for liquefied petroleum gas. IlSpecification for domestic gas stoves for use with liquefied pertroleum gases ( third revision ) . l/Specification for domestic cooking ranges including grillers, for use with liquefied petroleum gases (Jirst re0ision ). **Specification for domestic grillers for use with liquefied petroleum gases. 4 IS:120113. INSTALLATION 3.1 Place of Installation 1987 3.1.1 The kitchen or room where the appliance is installed shall be well ventilated SO that leakage of gas, if any, during faulty lighting or extinguishing of flame is swept away by natural draft. 3.1.2 The kitchen or room door open to the atmosphere. 3.1,3 The door shutter 3.1.4 The or entry/exit kitchen door at floor level. door opening to basement. shall shall have have at least one window a minimum and one gap of 3 mm under lift shaft of the kitchen shall not be near the 3.2 Installation 3.2.1 The approximately of Appliance appliance shall preferably be installed on the 75 cm high facing the wall from the floor level. shall not be checked with naked fire platform 3.2.2 The leakage match stick. or lighted 3.2.3 Appliance with open flames shall not be placed directly in front of window facing a strong breeze, disturbing/blowing off or extinguishing the flame. 3.2.4 Cabinets, shelves or such other mountings appliance shall be totally avoided ( lest loose may come in contact with flames while removing mountings ). on wall behind the clothing such as sarees the contents from wall 3.2.5 In absence of cooking platform, or in an unavoidable situation are both installed at same level, an where the appliance and cylinder `Extension Piece' of metal shall be used on approved/appropriate appliance inlet connection for connecting the flexible tubing. 3.2.6 Ensure that the inlet nozzle to the appliance at which the cylinder is kept. 3.3 Installation of Cylinder is on the same side 3.3.1 The gas cylinder shall always be installed in an upright/vertical Under no circumstances, it shall be placed position and at floor level. horizontally. 3.3.2 If cylinder is installed event of leak, liquid LPG will leakage of gas. in a position other than vertical, leak which is highly hazardous in the than 5 IS: 12011-1987 3.3.3 Do not use stands for cylinder. on its ,`foot ring' welded at the bottom. Cylinders must always be kept 3.3.4 The installed cylinder shall be easily accessible and shall not be placed in closed enclosure. The place of location shall be such that leaked gas, if any, shall be swept by natural draft. 3.3.5 The get disturbed cylinder shall be so installed that the gas tubing due to movement of operator during use. shall not 3.3.6 Gas cylinder shall not be placed kerosene stove, open fire chullas, heaters, of heat. 3.3.7 The LPG installation near any source of heat, such as boilers or any potential sources on a loft. shall not be provided 3.3.8 The LPG installation shall not be provided in a basement where the floor level is below the adjoining ground level. Only if effective artificial floor level ventilation is provided, the installation could be in such a basement. 3.3.9 Whenever empty gas cylinder is replaced with filled one ( refill ), ensure that the cylinder valve outlet carried a proper and undamaged rubber gasket. Absence of such a gasket will result in hazardous gas leakage. 3.3.10 After installing new connection or replacing the empty gas cylinder the joint between the rubber tube 2nd pressure regulator nozzle and that between rubber tube and appliance nozzle shall be checked with soap solution against the leakage. 3.3.11 The leakage match stick. shall not be checked with naked fire or lighted 3.3.12 Do not change code, the `Signal Red' LP gas. the colour of cylinder. As per international colour identifies that the cylinder contains material should be stored in the or in the same room in which it is should be used on the valves or This ring. will 3.3.13 No flammable or combustible immediate vicinity of the cylinder kept. 3.3.14 No oil or similar lubricant other fittings of the cylinder. 3.3.15 Look for the next due date of re-testing of the is indicated at the back of one of the 4 vertical supports If this date is over, `Do Not' accept the cylinder. 3.3.16 Cylinders shall cause them to corrode. not be installed 6 under cylinder. for handle which conditions LS : 12011- 1987 3.3.17 Cylinders are filled by weight. An overfilled Do not accept such cylinder. potential safety hazard. 4. GAS TUBING to IS : logo& tubing. cylinder is a 4.1 The flexible tube used for the installation shall conform 1984" or any other approved type metallic shielded/braided 4.2 The tubing shall be regularly checked for its condition especially the ends which can develop cracks while in service. It is necessary to replace tubing immediately if found to develop defects and recommended to replace after its maximum service of two years. 4.3 The tubing shall preferably be secured to the nozzles appliance as well as pressure regulator with the help of either or any other appropriate fastener or provision. both for hose-clip 4.4 Rubber tubing shall be cut with a sharp blade SO as to get a clean end face. The end of the tubing be slipped on to the nozzle to cover the entire length of the nozzle. 4.5 The tubing end may be moistened with water while slipping the solution shall not be tubing on to the nozzle. Oil/g rease/lubricant/soap used for slipping the tubing. 4.6 The tubing shall not have crimps or sharp kinks. It shall not unnecessarily be too long nor too short. The maximum recommended length of the tubing is 1.5 metres. 4.7 Tubing for domestic installation has been standardized for two sizes of bore that is 6.1 mm bore and 7.0 mm bore. Select the correct bore depending on the size of the nozzle on appliance as well as on pressure regulator ( see also 5.2 ). 5. APPLIANCE 5.1 Certification of the appliance by BIS/respective Oil Company shall be the guiding factor for its quality and safety-worthiness. In case of imported appliance manufactured to known international specifications approval for use shall be verified in consultation with Oil Company. 5.2 Prior to connecting the appliance, it shall be ensured that its inlet nozzle has the same size ( outer diameter ) as that of the nozzle on This is essential SO that rubber tubing fits tightly at pressure regulator. both the ends ( see also 4.7 ). ~5.3 The burners for LPG stoves and cooking range top burners are designed and approved to give greenish blue stable flames in full on and simmer position of gas taps. In case this is not abtained, the appliance needs to be checked/attended by a trained mechanic of the LP gas distributor. *Specification for flexible rubber tubing for liquefied petroleum gas. 7 IS t 12011 - 1987 6. INSTRUCTIONS 6.1 The consumers ' provided following FOR USE instructions In addition as the posi- shall be guided by the operating by the manufacturers with the appliance. safe practice shall also be ensured: a) Before operating the pressure regulator knob to `gas flow' tion, ensure that the appliance taps are in `OFF' position. bring the lighted match stick very b) For lighting the appliance, near to the burner ports ( head ) and then open gas cock of the appliance to full `ON' position so as to avoid escape of unburnt gas. c) In case of delay/failure in lighting the burners, resulting in escape of unburnt gas, close the appliance taps and wait till the malodourantjfoul smell indicating presence of leaked gas disappears. Light the burners again following earlier instructions for lighting. This would avoid a situation of any minor fire or explosion. d) The burner taps. e) The f) burners shall not be lighted shall not be lighted in `Simmer' position of appliance with vessels on it. When the appliance is not in use, close the appliance taps and turn the regulator knob to `gas off' position before leaving the place. 7. CHANGING OF CYLINDER 7.1 The consumers shall ensure to follow the `Customer Instruction Card' provided by Oil Companies through their LP Gas distributor while releasing/installing a new connection. 7.2 Put out all the flames or sources of fire in the kitchen. Avoid putting on/off any electric appliance. Keep the door/window open. 8. RESERVE CYLINDER ( UNCONNECTED remove ) the `Safety Cap' 8.1 On receipt of filled cylinder, provided on valve outlet. 8.2 Ensure that the valve the seal and with rubber outlet is provided gasket. 8.3 Press in the `Safety Cap' on valve outlet. This is necessary to ensure that the gas will not leak out from an unconnected cylinder with leaky valve pin. This also prevents ingress of foreign matter in valve outlet which can render valve leaky when in use. 8 IS : -12011 - 1987 9. TO HANDLE 9.1 If you hazards: a) Shut the burner position. taps and pressure regulator knob, to `OFF' smell LEAKAGE gas, follow the following procedure to prevent fire ' b) Open the door and windows for free ventilation. Do not switch `ON' or `OFF' any electric) Extinguish all flames. cal equipment to avoid any electric spark or such other sources of fire/ignition. d) Light the burners only after the smell disappears. e) In case of persistent/heavy leakage, detach the pressure regulator from the cylinder valve, fit the `Safety Cap' on the valve outlet and remove the cylinder ( without tilting it ) to balcony or open space where it is least dangerous to life and property and away from any source of ignition. Keep away to avoid starvation of Oxygen due to breathing the gas concentrated air. f) Call your I;P Gas distributor for handling the emergency. or emergency cell of oil companies 10. CLEANING the manufacturers fI.)llowing practice THE APPLIANCE by the 10.1 The consumers shall be guided by the instructions as provided If necessal y, in addition with the appliance. is recommended for cleaning of the appliance: a) Close the appliance taps and pressure regulator knob to `OFF' position and wait till the surface of the appliance is cooled. If you attempt to clean hot surface with wet cloth, the surface finish may crack. b) First clean the surface of appliance with dry cloth. Then it with a moist cloth to remove stains from spilled cooking. clean c) To clean the burner head and mixing tube, remove it and dip it in warm solution of soap in water and clean the burner ports with `tooth prick' or a soft metal ( copper or aluminium ) wire. Clean it with plain water and then clean the mixing tube internally with a stiff bottle brush. Wipe it dry to prevent rusting. d) Do not tamper with steel pin. with the gas jet/orifice nor attempt to clean it e) Never soak the appliance body in water as the in the gas tap may be washed away resulting of leakage of gas. 9 grease/lubricant in the possibility IS : 12011- 1987 11. ACCIDENTS 11.1 Statutory LPG installation AND ENQUIRIES of accident(s), involving regulations demand that notice be given forthwith: a) to the Chief Controller of Explosives for India by Express Telegram ( Telegraphic Address - EXPLOSIVES, NAGPUR ) followed by a letter giving particulars of the occurrence within 24 hours; and b) to the Officer-in-Charge quickest route, of the nearest Police Station by the This would normally be complied with by the concerned LPG Distributor and/or Oil Company, after proper enquiry and investigating the circumstances leading to accident. For these reasons and also for legalities involved in insurance~claims, it is recommended that in any room the LP Gas equipment installed shall only be from one Oil Company. 10